I know used a desktop environment on the box isn't recommended but it's simpliest for me to do like this. This is the output of command lines.

It was confusing whether you were posting the output from the client or the server. The commands I wanted you to run are meant to be run on the server. I see now that your client has a desktop environment. I missed the part that you mounted the disk on the desktop. There should be no need to do this. If you could access the OMV web interface to see the ssh settings, then you could create a new user that is a member of the sudo group to login to the system. If you can't login with any user via ssh, then try to login locally. If that doesn't work, then you would need to look at the /var/log/auth.log to figure out why. You should be able to look at that file since you have it mounted on your system.

Thank you I Make a mistake when I created an other root account ... I had it in root group whereas it must be in sudo group. I tried your commands on the server (there is a problem with ssh connection (acces denied) but in local it work. You will find photos with previous commands.

I tried your commands on the server (there is a problem with ssh connection (acces denied) but in local it work. You will find photos with previous commands.

That is very strange output. First, lsb_release should exist. Second, your sshd config is missing the PermitRootLogin line that OMV writes. That makes me think OMV has never written the config file. Third, your Jean user has full sudo privileges. So, you should be able to fix things without the root account.

sudo passwd root will allow you to change the root password.omv-mkconf ssh should write the sshd config. After doing that post the output of:dpkg -l | grep openmgrep PermitRootLogin /etc/ssh/sshd_config

Before do anything else are you sure there isn't anything else to do to create a root user ?

The root user always exists. If you can't login as root via ssh, that is not because the root user does not exist. If you can't login locally with the root user, you have the wrong password. So, that is why I said you should reset the root password.

The root user always exists. If you can't login as root via ssh, that is not because the root user does not exist. If you can't login locally with the root user, you have the wrong password. So, that is why I said you should reset the root password

The password has been changed but the page is refresh like I never do something ...

I don't like the result ... I should install again the system on a new media ... I know the best is to install it on a hard disk but it don't exist hard disk with 4 or 8go and use a bigger I find that ridiculous because on the other case I use a big RAID 5, USB key is better for it and easier to do backup of system.

Thank you very much for you help, it seem I had seen clamav plugin can create this problem after time ... Therefore I reinstall OMV with 4.X version and root user work ! :). After recreate again all users ... I will create a iso from the USB key like version 3.x but this time I try without installing clamav plugin !